Try another version of this question Get help: Box 1: Enter each element of the matrix as number (like 5, -3, 2.2)
Add: `[(-2,-8,8),(-8,-1,-6),(1,5,4)] + [(-4,-5,-2),(-2,5,6),(-1,4,-8)]`
`[(-6,-13,6),(-10,4,0),(0,9,-4)]`